What is Chromate Conversion Coating?

Chromate conversion coating is a chemical immersion process used by Arrow Cryogenics to passivate aluminum. This low cost process is primarily used as a corrosion inhibitor and as a primer for paint, lacquer, or rubber bonding.

Trivalent Chromate Conversion coating is used as a replacement for hexavalent conversion coating.

Chromate conversion coatings have been in use since at least the 1960s; however, the hexavalent chromium chemicals used have been found to be highly toxic. As a result, governmental regulations restricting the amount of hexavalent chromium in coatings have been enacted. RoHS is a common reference point for the elimination of hexavalent chromium. Trivalent chromate conversion coatings, using non-toxic, non-hexavalent chromium, are now used almost universally as a replacement.